Thermal expansion valve with functions of one-way valve

Abstract

The invention discloses a thermal expansion valve with functions of a one-way valve. The thermal expansion valve comprises a valve body, wherein the valve body is provided with a first valve opening and a second valve opening, a valve seat of the valve body is provided with a valve core assembly which is matched with the valve seat, the valve core assembly comprises an expansion valve core and a one-way valve core, the one-way valve core is arranged on a guide sleeve of the expansion valve core, the guide sleeve is fixedly arranged on the valve body, and the one-way valve core is axially and movably arranged on the guide sleeve. When the thermal expansion valve works in the opposite direction, a medium guide passage for communicating the first valve opening and the second valve opening is formed between the one-way valve core and the valve seat. The thermal expansion valve has the advantages that the one-way valve core is axially and movably arranged on the guide sleeve; when the thermal expansion valve works in the opposite direction, the medium guide passage for communicating the first valve opening and the second valve opening is formed between the one-way valve core and the valve seat, so a plugging part is not needed, the structure of the thermal expansion valve core is simplified, and the assembly difficulty is reduced; the valve seat and the one-way valve core are axially and movably connected, so a fixing part is not needed, and the processing difficulty of the valve seat is favorably reduced.

Description

technical field [0001] The invention relates to the technical field of refrigerant fluid control components, in particular to a thermal expansion valve with the function of a one-way valve. Background technique [0002] The thermal expansion valve is an important part of the refrigeration system and one of the basic components of the refrigeration system. The main function of the thermal expansion valve is to control the opening of the valve by sensing the superheat of the evaporator outlet or compressor suction in the refrigeration system, so as to achieve the purpose of system refrigerant flow regulation and throttling and pressure reduction. [0003] Generally, if the evaporator and condenser are far away from the compressor pipeline in the refrigeration system (about 25 meters), a thermal expansion valve is realized by connecting a check valve in parallel (the direction is opposite to that of the thermal expansion valve). The flow direction of the one-way valve is oppos...

AI Technical Summary

Problems solved by technology

[0008] It can be seen from the above that the check valve core 2' of the thermal expansion valve has many components, and the assembly is relatively complicated, and it is necessary to process the fixing seat for fixing the check valve core 2' on the valve seat 11'. As a result, the structure of the valve seat 11' is relatively complicated, and the processing difficulty is relatively high

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